Fix gradle plugins

[stokito]

The build.gradle uses a a plugin org.kordamp.gradle:clirr-gradle-plugin:0.2.2 that is very outdated. It comes from the dl.bintray.com/content/aalmiray/kordamp repo that is even not works anymore.
I tried to repair it and upgrade to latest version but that was too complicated for me. Anyway, the plugin currently is disabled. So instead I removed it for now and if anyone can restore it and enable then you may check history.
Check it's documentation https://plugins.gradle.org/plugin/org.kordamp.gradle.clirr

The biz.aQute.bnd.builder plugin was added in an old Gradle style so I migrated it to the new and declared in the plugins. I also updated it from v6.0.0 to v.6.4.0.

The jcenter() repo doesn't exists anymore and I removed it. The https://plugins.gradle.org/m2/ replaced with gradlePluginPortal().

[stokito]

since the repo hasn't issues tab I'll report the problem here

Compilation failed because the org/jivesoftware/smack/android/AndroidSmackInitializer.java:41 uses a deprecated StrictHostnameVerifier.
The class should be replaced with the DefaultHostnameVerifier.
But the httpclient library that is used in a project is actually older then the StrictHostnameVerifier was deprecated so I'm confused from where the Gradle get the deprecation notice.

To temporary fix the problem I had to disable compilation failing in warning and removed from the build.gradle the '-Werror', line. Not sure how to fix this properly.

In the 7562528 package-info.java files were replaced with symliks. I made a clone of the repo and instead of symlinks I got them as files with ../../../../../../../../../smack-core/src/main/java/org/jivesoftware/smack/util/stringencoder/package-info.java as a content. Probably on Windows they were committed as files.

I made a temp commit for myself to pass the compilation where I replaced the content of files with a package statements c2212ef

But we should ether restore the symlinks or just get pack to plain files (it's ok if they will be duplicated)

[Flowdalic]

Thanks for your contribution.

I always hoped to re-enabled clirr, since the functionality it provided was great. But it seems about time that we drop it.

Also kudos for making the changes in two commits. +1

LGTM

[stokito]

Thank you. Please also check my vomment about package.info.

Could you please open issues on the repo? In the Jira I don't have a permission report a bug, only in the Spark project